package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavors(DishDTO dishDTO) {
        log.info("菜品信息：{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        List<DishFlavor> flavors = dishDTO.getFlavors();
        dishMapper.save(dish);
        if (flavors != null && flavors.size() > 0) {
            Long id = dish.getId();
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            dishFlavorMapper.saveBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void deleteByIds(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.selectById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        Long count = setMealDishMapper.countByDishId(ids);
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }

    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
        List<Long> ids = new ArrayList<>();
        ids.add(dishDTO.getId());
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
        saveWithFlavors(dishDTO);
    }

    @Override
    public DishDTO getById(Long id) {
        Dish dish = dishMapper.selectById(id);
        DishDTO dishDTO = new DishDTO();
        BeanUtils.copyProperties(dish, dishDTO);
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        dishDTO.setFlavors(flavors);
        return dishDTO;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.updateStatus(status, id);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        List<Dish> dishes = dishMapper.list(dish);
        return dishes;
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
